2008 - 2013 Kawasaki KFX450 ATV PLATINUM forged piston kit. Project X series with coated skirts, full box style forging and other advanced features. For use in high performance and racing engines; for use with a standard size bore of 96mm and stock stroke of 62.1mm 450cc 13.8-1 compression and a Carrillo rod that is 3mm longer than stock,using a 2mm smaller pin. This piston will work ONLY with the matching Carrillo Platinum connecting rod. Kit includes light weight piston; light weight piston pin; piston rings and pin lock rings.